Doktor vs Arzt
Difference between Doktor and Arzt/Ärztin
Could it be the same as in English? A doctor is a very broad academic term, like the other person said it is a title, (highest academic achievement) in a variety of disciplines e.g a doctor of literature, a doctor of philosophy, psychology, engineering (also medicine) whilst an Artzt is very specific, that is a medical doctor. I think all medical doctors also have doctorates so they can use the title Doktor also?
Please have a look at this site: https://de.m.wikipedia.org/wiki/Doktor_der_Medizin
Ok, gSY etc, point taken, not all doctors have doctorates. It appears that you can be a medical doctor, but without having a doctorate and so without the academic title 'Dr.'. So this would be an Artzt? So why does my local Artzt or GP (General Practitioner) or MD (medical doctor) call themselves 'Dr. Smith'? Obviously only medical doctors (and dentists?) can use the title Dr' without having a doctorate, all others who call themselves doctors have to have a doctorate degree/PhD? (BTW in my earlier comment I should have said 'highest academic degree', not 'highest academic achievement', my mistake).